Questions tagged [performance]

Questions pertaining to software performance or computational speed of Blender should use this tag. (Do not ask hardware specific questions. They are considered off-topic)

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Does decimate help viewport performance?

I'm seeking to increase viewport performance to help when posing/animating. Does it work to just toss a decimate on my objects? Will this actually help performance, or just add the extra calculation ...
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Why does it take so much longer to track uncached frames?

I'm attempting to track a slightly longish shot, and I don't want to fill up all my ram. I can play the animation with ⎇ AltA and blender caches and displays uncached frames in near real-time (~...
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Hacks for improving performance on large scenes

Hi I’m using blender mostly doing exterior architecture visualisations. Through previous months I’ve found many problems that affects this software. But the main issue is lack of performance power ...
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Screw Modifier Best Practices

I am creating a three-strand rope in blender using the screw modifier and was wondering what might be best practices for making a long rope. Essentially it is a choice between iterations or degrees. I ...
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Recurring issue, Can anyone help me fix Blender hanging before the file browser appears?

I have been using Blender for a little over five years now and just recently it has started to freeze up or hang whenever I click any button that activates the file browser. Whether it be browsing for ...
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1k views

make blender faster while working. not concerned about render speeds

So, to start off. I'm a member of cgcookie.com. they offered some pretty good tips, like turning of VBO and stuff. Still, I just feel like for having an home built i5 and an GTX970 card and 16GB of ...
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237 views

Creating/Handling pathfinding large world waypoints in Blender

I am trying to create an importer/exporter script for an open world's game map. However, I am being constantly hit and set back by performance of blender. I want to be able to create way points for ...
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17 views

Script runs very slow when changing parameters in Add Object menu

I've made my first addon based on an internal blender Text editor template. It is used to add primitive meshes and then control some of their aspects, much like adding primitives like Cubes or UV ...
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36 views

Blender Benchmark crashes

I tried to run Blender benchmark because I felt it was a bit slow today working and the GPU was being used intensively in the task manager while sculpting, and I didn't used my new laptop for 3d too ...
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38 views

Viewport performance, i9-9900k vs Ryzen 3970x?

(Apologies in advance in case this is the wrong place to ask this!) I'm building a new workstation and trying to decide which CPU to go with. Does the viewport performance in Blender benefit from ...
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145 views

Is there a way to determine why Blender is running so slow?

I have a pretty large project (about 1GB, 4 scenes) and recently Blender has become too slow too use. A couple of annoying things, other than just lagging are: I can not scale or move objects with ...
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90 views

No render speed difference in Eevee cpu vs gpu

My gpu got damaged last night so I removed it and started using blender with cpu only. I found that there is no difference in render speed or performance between cpu vs gpu. 2 second per frame on cpu ...
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42 views

Cycles: Build without SSE and AVX

I am trying to benchmark Cycles performance without SSE, with SSE only, and with AVX instructions. I am finding weird behavior where if I switch off the "WITH_CPU_SSE" flag in CMakeLists.txt, the ...
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1answer
362 views

EEVEE render not using GPU fully

I am rendering PNG RGBA frames in EEVEE of a camera fly over a historic building modeled in Blender 2.80.74. PC specs: i7 with 20GB, 1Gb SSD and a GTX 1070 & GTX 1050. EEVEE uses only the GTX 1070....
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is it possible to limit texture resolution by distance?

I know in the simplify tab you can set a reduced texture size for all of the scene, but is it possible to reduce the texture size in vram based on distance from the camera? For example I have a 2km ...
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Blender file size increses drastically after joning duplicated object and performs very slow

When i join (CtrlJ) duplicated (ShiftD) multiple object or mesh then blender performs very slow and file size increases too from 100mb to 1gb. Does anyone have solutions for this issue?
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686 views

Blender 2.79 Cycles OpenCL RX Vega GPU extremely slow. (Ubuntu 18.04)

I am running Ubuntu 18.04 on a fairly powerful PC (Ryzen 2700x and Vega64) I finally managed to get OpenCL to work at all with ROCm-rehl drivers. When I render the default cube scene CPU rendering ...
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476 views

Blender does not seem to utilize CPUs and GPUs effectively for rendering

I've just built myself a new machine because rendering times on my laptop were prohibitive. It's an i7900 10 core processor, 32GB RAM and two Quadro P4 graphics cards with 8GB memory each. The cards ...
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156 views

Struggling with making an audience/public for an gladiator arena

I am a blender newbie, slowly catching up with the program and geting into 3D modeling. I've managed to create a huge arena model, and I have a lot of audience seats that should eventually be filled ...
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105 views

Blender 2.76b - Slow performance on Viewport Shading Material

I'm running Blender on Ubuntu 18.04 LTS; I use Blender 2.76b. My problem is when I turn the Viewport Shading to Material Mode, it is very very slow. It is even much slower (much!) than the Rendered ...
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41 views

Performance issues - make tree leaves like this?

Ok, I am trying to achieve animated, particle like leaves (low poly not realistic) like this - https://youtu.be/cKS3VM1a3TU?t=4m8s Obviously my idea was to make a group with some leaves and make a ...
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99 views

Imported .obj has too many faces

I imported a .obj file created with osm2world, and even though the imported objects are all low poly, they have many faces. E.g. this is just a simple plane: but has this many faces: Now my ...
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219 views

Speeding up the viewport

I just had a shock when I opened 2.28c (it's been far too long) The drawing was super fast on my EEEPC. All the time I thought my graphics card was slow (and it is by comparison) when actually ...
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163 views

Blender command Z is slow?

Alright I'm on mac latest OS, latest blender 2.79 and really just with command Z (this is just since updating) - it takes a WHILE like good 30s to undo something. Modeling, everything else pretty ...
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21 views

Multiple of same Render layer performance in the compositor

As far as performance goes, is there any penalty for duplicating the same render layer node multiple times, as opposed to using more noodles from the same node? For organizational purposes, i want to ...
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88 views

Performance relating to Object Instances

Just a simple performance question. When using object instances, the same vertex data is used for another object (like an exact duplicate) causing much less memory usage when building up the ...
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441 views

Keep images in memory between Cycles renders

I have an application which requires me to render hundreds of thousands of tiny images in Cycles. The scene uses a HDR Light Probe, which is ~100mb uncompressed in VRAM. I've noticed that the ...
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268 views

Separate windows are solid black when opening blender

I have a frequent problem where I separate out multiple blender windows onto my secondary screen. These are usually node editors and UV/Image viewer windows. When I re-open blender, often these ...
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229 views

Blender snap (linux, specifically Ubuntu 17.04) very slow / freezing when in material view

I recently downloaded the Blender snap from Ubuntu Software because it seems to be always up to date, Then I opened one of my projects to continue working on, then it just freezed for a sec then ...
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304 views

Is there any way to optimize the performance of blender on my computer?

Quite some time back I had blender on this very computer and it worked great. Recently, my hard drive crashed and I decided to switch to SSD. I reinstalled blender on my computer and ran it. Now ...
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518 views

Performance issues with blender VSE preview during effects only

My system information: Operating System - Windows 10 (64 bit) CPU - i7-5930K @ 3.50GHz RAM - 32GB DDR4 (4x8GB) GPU - AMD R9 Fury X Storage - PCI-e SSD OCZ Revodrive (500 MB/s writes, 900 MB/s reads) ...
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104 views

Play Rendered Animation CPU Consumption

How can I use the feature [Play Rendered Animation] without excessive CPU Consumption? When I use play rendered animation the CPU often is consumed excessively. I am not rendering at this time. ...
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228 views

Cache slow animation?

Let's say I have an animation that my computer can only process at an incredibly slow rate (A forest, for example). Is it possible to cache the animation so I can work with it (and only have to ...
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207 views

Blender runs really slowly on my Cintiq 22HD

I have a computer with a three monitor setup. One of the monitors is a Cintiq 22HD that allows me to draw on the screen. I also have an old Intuos 3 hooked up that lets me draw with a pen in the ...
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1answer
29 views

Integrated Graphics Requirments for Newer Laptops?

I'm buying a 10th Gen Intel Core, HP laptop. The specs say it only has an Intel Graphics Coprocessor. Will it run blender 2.8? https://www.amazon.com/2020-HP-Touchscreen-Premium-Laptop/dp/B081SM57RY/...
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26 views

Blender 2.81a is slow on Macbook pro when selecting items from the Properties window

I recently got a new MacBook Pro so I have more free space on my computer's memory than ever before and yet my properties window still makes blender run slowly. My Macbook pro is a new model so it's ...
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1answer
19 views

Issue with Collada export on Mac OS Catalina

did any of you experience a problem with Collada (.dae) export of bigger files? I have a blender project with a number of animations (11 MB in total). I've recently updated Mac OS from 10.14 (Mojave) ...
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22 views

large poly count performance

I tried loading a model with a large number of polygons - it really made blender 2.81 crawl. 6.4 million-triangle 3D scan of the Bust of Nefertiti. aem_aem21300_3dsl01_mo08-03_p.obj from https://www....
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1answer
51 views

Cycles Smoke render - Extremely poor performance & crashes

I have a decent new build: 3700x + 2x 5700XT, 32gb ram, using 2.81. I thought smoke rendering for a fairly simple scene would be a breeze (excuse the semi-pun) but for a render of a scene containing ...
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1answer
54 views

I have better than optimal hardware but Blender keeps crashing

I am trying to get started using blender and follow a simple tutorial to get used to creating abstract renders for design work. While running blender even performing the simplest of tasks my computer ...
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17 views

How to make performance test while render my scenes

I want to do a performance test via scenes that I created. Could you give me some tips or applications which will check performance in the blender? GPU, CPU, Memory usage? Or maybe it's possible to ...
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Why does my project run so much faster in Texture Paint mode than in Layout mode (and sprites render without alpha)

I have a fairly complex scene that is running pretty slowly (not just to render, but the whole GUI is running sluggishly). I think it is because I have a smoke simulation in the scene but I am not ...
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Performance hiccups on the first frames

I started noticing something really annoying in my PC. I'm running Blender 2.80 with a GTX1080Ti, Ryzen 7 1700 and 16GB DDR4 RAM. Everytime I move my camera or zoom in or move an object there is a ...
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Rigify rigs in Blender scene are making some very bad lag. How to fix performance issues?

I have a scene where there are 2 human models rigged with rigify. I cannot animate these anymore because when they're in the viewport, I get about 6 FPS on the animation preview. I know for a fact ...
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41 views

low framerate and crashes in the viewport by using not even up to 30% GPU and CPU

Hello im new in blender and wana ask is that normal by my PC that it this scene if i play it for the first time i got 1 to max 15 fps . And my GPU and CPU usage is not even by 30% . And if i for ...
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Desktop GTX 1070 barely faster than GTX 1050-Ti mobile in cycles

I'm rendering 10 frames of a scene both on a Dell XPS 15 Notebook and my Desktop PC. Desktop: i5-2500K + GTX 1070 8GB Notebook: i7-8750H + GTX 1050-Ti mobile Desktop: CPU (i5-2500K): 2:34 min GPU ...
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Intel optane, does it have any benefit in Blender?

I heard Intel optane has benefit in 3d application by making them load faster and other benefits include 3d modeling. Blender already loads faster than the other 3d applications I use and we have the ...
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15 views

Super long transition from one frame to another in Cycles' rendering animations!

I'm rendering a 4 minute animation that's AV-synced to my new song. So far, I have followed pretty much all possible my Cycles rendering, namely increasing the Tile Size for GPU Compute, lowering ...
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Blender 2.8 cannot save document, or cannot re-open a document (sculpting) and crashes my whole computer

I run Mojave 10.14.6, 8 GB My downloaded Blender 2.8 from the blender 's website two weeks ago. It seems rather random. In sculpting mode, some files suddenly won't save. Instead the program freezes ...
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39 views

Sculpting bad performance

I have an AMD Radeon RX Vega⁶⁴ graphics card and is experiencing slow performance while sculpting. Is there something wrong with the graphics card, or a bug in Blender? This just seems really odd, ...